Separator, electrochemical apparatus and electronic device
AssigneeNingde Amperex Technology Limited
InventorMinjing Chen
Life of this patent
Estimating the term…
Abstract
A separator comprises aluminum atoms and fluorine atoms, and in a 2 μm×2 μm region, a ratio A of atomic percentages of the aluminum atoms to the fluorine atoms satisfies 1≤A≤4. The separator includes a substrate, and the surface of the substrate is provided with a coating. The coating includes a plurality of spaced stripes, and an average spacing between two adjacent stripes is 1 mm to 3 mm. The separator provided in this application can improve the high-temperature cycle performance, low-temperature intermittent cycle performance, and thermal safety performance of the electrochemical apparatus.
Claims20
A separator, wherein the separator comprises aluminum atoms and fluorine atoms;
- in a 2 μm×2 μm region of a scanning electron microscope image of the separator, a ratio A of an atomic percentage of the aluminum atoms to an atomic percentage of the fluorine atoms satisfies:
- 1≤A≤4;
- and the separator comprises a substrate, a surface of the substrate is provided with a coating, the coating comprises a plurality of stripes spaced apart from each other, and an average spacing between two adjacent stripes is 1 mm to 3 mm.
An electrochemical apparatus, comprising a positive electrode plate and a negative electrode plate, wherein the electrochemical apparatus further comprises a separator, and the separator is disposed between the positive electrode plate and the negative electrode plate;
- the separator comprises aluminum atoms and fluorine atoms;
- in a 2 μm×2 μm region of a scanning electron microscope image of the separator, a ratio A of an atomic percentage of the aluminum atoms to an atomic percentage of the fluorine atoms satisfies:
- 1≤A≤4;
- and the separator comprises a substrate, a surface of the substrate is provided with a coating, the coating comprises a plurality of stripes spaced apart from each other, and an average spacing between two adjacent stripes is 1 mm to 3 mm.
An electronic device, wherein the electronic device comprises the electrochemical apparatus, the electrochemical apparatus comprises the separator, wherein the separator comprises aluminum atoms and fluorine atoms;
- in a 2 μm×2 μm region of a scanning electron microscope image of the separator, a ratio A of an atomic percentages of the aluminum atoms to an atomic percentage of the fluorine atoms satisfies:
- 1≤A≤4;
- and the separator comprises a substrate, a surface of the substrate is provided with a coating, the coating comprises a plurality of stripes spaced apart from each other, and an average spacing between two adjacent stripes is 1 mm to 3 mm.
Dependencies are inferred from the claim text.